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Can you ARP a different subnet?
ARP only works between devices in the same IP subnet.
Can a router send a ARP request?
The data arrives at the router, and the router determines whether the second host is local to any of its attached network interfaces or network segments. If the second host is on a connected network segment, the router can send an ARP request looking for the MAC address of the host with the 10.45.
Are ARP requests forwarded?
ARP on Layer-3 Networks If the Layer-3 destination IP address belongs to a different network than the host’s local network, then the packet is forwarded to the local gateway instead. The Router will send an ARP request for both Host 2 and Host 1 and will store their IP and MAC addresses in its ARP cache.
How do ARP requests work?
ARP broadcasts a request packet to all the machines on the LAN and asks if any of the machines know they are using that particular IP address. When a machine recognizes the IP address as its own, it sends a reply so ARP can update the cache for future reference and proceed with the communication.
Can a gateway ARP request be sent outside the subnet?
ARP requests for addresses outside the subnet won’t be sent at all. The only ARP request will be for the gateway’s IP address. If you just set up 192.168.123.1/24 for computer A and do not do anything else, it will have a routing table like this: 192.168.123.0/24 to device eth0.
How to send ARP request with IP adress?
It decides to send the package to his default gateway (router) and sends an ARP request with the IP adress of the router. Next: the router replies with his mac Address and the frame is send to the router, which will take care of the frame. Computer A, is “stupid” and sends an ARP request with the IP address of B.
When does host E send an ARP query message?
When the router is present between sub net 2 and 3 no ARP query message is send but when this router is replaced by a switch then Host E would send an ARP query message? Why will it send in the presence of the switch?
What kind of protocol is the ARP protocol?
ARP is a Link Layer Protocol which uses the hardware address to communicate. It has no dependencies nor is it restricted by higher layer protocols such as IP. Thanks for contributing an answer to Server Fault!